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      1 /*
      2  * linux/include/linux/lockd/xdr.h
      3  *
      4  * XDR types for the NLM protocol
      5  *
      6  * Copyright (C) 1996 Olaf Kirch <okir (at) monad.swb.de>
      7  */
      8 
      9 #ifndef LOCKD_XDR_H
     10 #define LOCKD_XDR_H
     11 
     12 #include <linux/fs.h>
     13 #include <linux/nfs.h>
     14 #include <linux/sunrpc/xdr.h>
     15 
     16 #define NLM_MAXCOOKIELEN    	32
     17 #define NLM_MAXSTRLEN		1024
     18 
     19 #define	nlm_granted		__constant_htonl(NLM_LCK_GRANTED)
     20 #define	nlm_lck_denied		__constant_htonl(NLM_LCK_DENIED)
     21 #define	nlm_lck_denied_nolocks	__constant_htonl(NLM_LCK_DENIED_NOLOCKS)
     22 #define	nlm_lck_blocked		__constant_htonl(NLM_LCK_BLOCKED)
     23 #define	nlm_lck_denied_grace_period	__constant_htonl(NLM_LCK_DENIED_GRACE_PERIOD)
     24 
     25 /* Lock info passed via NLM */
     26 struct nlm_lock {
     27 	char *			caller;
     28 	int			len; 	/* length of "caller" */
     29 	struct nfs_fh		fh;
     30 	struct xdr_netobj	oh;
     31 	u32			svid;
     32 	struct file_lock	fl;
     33 };
     34 
     35 /*
     36  *	NLM cookies. Technically they can be 1K, but Linux only uses 8 bytes.
     37  *	FreeBSD uses 16, Apple Mac OS X 10.3 uses 20. Therefore we set it to
     38  *	32 bytes.
     39  */
     40 
     41 struct nlm_cookie
     42 {
     43 	unsigned char data[NLM_MAXCOOKIELEN];
     44 	unsigned int len;
     45 };
     46 
     47 /*
     48  * Generic lockd arguments for all but sm_notify
     49  */
     50 struct nlm_args {
     51 	struct nlm_cookie	cookie;
     52 	struct nlm_lock		lock;
     53 	u32			block;
     54 	u32			reclaim;
     55 	u32			state;
     56 	u32			monitor;
     57 	u32			fsm_access;
     58 	u32			fsm_mode;
     59 };
     60 
     61 typedef struct nlm_args nlm_args;
     62 
     63 /*
     64  * Generic lockd result
     65  */
     66 struct nlm_res {
     67 	struct nlm_cookie	cookie;
     68 	u32			status;
     69 	struct nlm_lock		lock;
     70 };
     71 
     72 /*
     73  * statd callback when client has rebooted
     74  */
     75 struct nlm_reboot {
     76 	char *		mon;
     77 	int		len;
     78 	u32		state;
     79 	u32		addr;
     80 	u32		vers;
     81 	u32		proto;
     82 };
     83 
     84 /*
     85  * Contents of statd callback when monitored host rebooted
     86  */
     87 #define NLMSVC_XDRSIZE		sizeof(struct nlm_args)
     88 
     89 int	nlmsvc_decode_testargs(struct svc_rqst *, u32 *, struct nlm_args *);
     90 int	nlmsvc_encode_testres(struct svc_rqst *, u32 *, struct nlm_res *);
     91 int	nlmsvc_decode_lockargs(struct svc_rqst *, u32 *, struct nlm_args *);
     92 int	nlmsvc_decode_cancargs(struct svc_rqst *, u32 *, struct nlm_args *);
     93 int	nlmsvc_decode_unlockargs(struct svc_rqst *, u32 *, struct nlm_args *);
     94 int	nlmsvc_encode_res(struct svc_rqst *, u32 *, struct nlm_res *);
     95 int	nlmsvc_decode_res(struct svc_rqst *, u32 *, struct nlm_res *);
     96 int	nlmsvc_encode_void(struct svc_rqst *, u32 *, void *);
     97 int	nlmsvc_decode_void(struct svc_rqst *, u32 *, void *);
     98 int	nlmsvc_decode_shareargs(struct svc_rqst *, u32 *, struct nlm_args *);
     99 int	nlmsvc_encode_shareres(struct svc_rqst *, u32 *, struct nlm_res *);
    100 int	nlmsvc_decode_notify(struct svc_rqst *, u32 *, struct nlm_args *);
    101 int	nlmsvc_decode_reboot(struct svc_rqst *, u32 *, struct nlm_reboot *);
    102 /*
    103 int	nlmclt_encode_testargs(struct rpc_rqst *, u32 *, struct nlm_args *);
    104 int	nlmclt_encode_lockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
    105 int	nlmclt_encode_cancargs(struct rpc_rqst *, u32 *, struct nlm_args *);
    106 int	nlmclt_encode_unlockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
    107  */
    108 
    109 #endif /* LOCKD_XDR_H */
    110